Rolling-mill.



No. 645,306. Patented IIIar. I3', I900. S. T. WELLMAN, F. H. DANIELS 8.C. H. WELLMAN.

ROLLING MILL.

(Application filed Aug. 1'0, 1899.) (No Model.) 4 Sheets-Sheet I.

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S. WELLMAN, F. H. DANlELS & C. H. WELLMAN. ROLLING MILL.

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No. 645,306. Patented Mar. l3, I900. s. T. WELLMAN, F, H. DANIELS & c.H. WELLMAN.

ROLLING MILL.

(Application filed Aug. 10, 1899.)

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(No Model.)

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No. 645,306. Patented Mar. I3, I900.

S. T. WELLMAN, F. H. DANIELS & C. H. WELLMAN.

ROLLING MILL.

, (Application filed .Au'g. 10, 1899.) (No Model.) 4 Sheets-Sheet 4.

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UNITED STATES PATENT OFFIGE.

SAMUEL T. WVELLMAN, OF CLEVELAND, OHIO, FRED II. DANIELS, OF WORCESTER,MASSACHUSETTS, AND CHARLES H. WELLMAN, OF

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 645, dated March 1900-Applib'ation filed August 10, 1899. Serial No. 7263818. (No model.

To all whom it may concern-.-

Be it known that we, SAMUEL TNVELLMAN,

of Cleveland, in the county of Cuyahoga and State of Ohio, FRED H,DANIELS, of Worcester, in the county of Worcester and State ofMassachusetts, and CHARLES H. WELLMAN, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented a certain new and usefulImprovement in Rolling-Mills, of which the following is a specification.

The rolling-mill in which our invention is comprised is one which may betermed a continuous ingot-blooming mill, and it has been designed moreparticularly with a view to rolling cast-steel ingots as they come, forexample, from the continuous heatingfurnace which is the subject of ourapplication filed June 30, 1899, Serial No. 722,455, although it may beused in other connections.

Our rolling-mill consists, generally speak- -ing, of a number of pairsof power-driven rolls placed tandem, or one after the other, combinedwith intermediate power-driven roller-tables which can be stopped andstarted at pleasure, and even reversed, if that movement also bedesired. The rolls are ofsufficient length for two grooves or passes.The ingot in its passage through the first series of grooves ispartially reduced, and the partlyfinished product is then carried backby suitable means and passed through the second series of grooves, bywhich it is fully reduced. The pairs of rolls are so spaced apart thatduring the first pass the product comes out from between one pair ofrolls before entering the next pair. It can thus be removed in case ofaccident, the roller-table on which it rests being of course stopped forthis purpose. On the other hand, during the second pass or travel of theproduct through the second series of grooves the original ingot hasbecome elongated to such an extent that the rolling process iscontinuous, the product in no case coming out from one pair of rollsbefore it enters the next pair. In this way we avoid the expense ofduplicating the pairs of rolls in the mill, which would involve a doubleoutlay, and otherwise simplify the plant. It

is desirable to present new faces of the product during its passagethrough the mill to the reducing action of the rolls. Inasmuch as theproduct during the first pass quits one pair of rolls before it entersthe next, it can be turned by any suitable manipulator at this timewhile it is resting on the rollertable; but at the second pass inasmuchas the product engages one pair of rolls before it quits the other othermeans for turning the product must be provided, for which purpose weemploy twist-guides.

The nature of our improvement can, how ever, best be explained andunderstood by reference-to the accompanying drawings, in which Figure 1is a plan view, Fig. 2 is a side elevation, and Fig. 3 is an endelevation, of a roller-mill embodying our invention. These three figuresare largely diagrammatic and are intended to illustrate the generalscheme or plan of the mill. The remaining figures- 7o viz., Figs. 4, 5,and 6--are upon a larger scale and are intended to illustrate moreclearly the structural details of the mill. Fig.

4 is a plan representing one of the pairs of rolls, together with theroller table or tables and other appurtenances adjacent to said pairs ofrolls, the end housings or supporting-frames of the reducing-rollsbeingin horizontal section. Fig. 5 is a side elevation of said parts.Fig. 6 is an end elevation of the same, showing also details of theconnections between the reducing-rolls and the power by which they aredriven, the details last referred to being omitted from Figs. 4 and 5.

In the mill shown in the drawings, referring more particularly now toFigs. 1 to 3, there are six pairs of reducing-rolls R to R, inclusive,placed in line one after the other, each separated from the one'inadvance by a suitable interval, as hereinbefore explained, 0 andcombined with intervening power-driven rollers, forming roller tables orsections lettered T to T, inclusive. Each roll is made sufficiently longto receive two grooves, and

in each there are formed two parallel grooves 7* r Figs. 4 and 6, theformer for the first pass and the latter for the second pass of theproduct through the mill. The rolls of each pair are housed in asuitable frame H, and all of them are driven from one engine a, whosedriving-shaft c is engaged by bevelgearing b to b, inclusive, Fig. 1, tocrossshafts, to which the pairs of rolls are respectively coupled bypinions and shafting d to d", inclusive, Figs. 1 and 6. The bevel-gearsb to b are of course so proportioned, as indicated in Fig. 1, as toimpart to the successive pairs of rolls the progressively-increasedspeed required. The rollers forming the roller table or tables aredriven from one or more electric motors M or other suitable motors. Inthis instance there are shown three motors M, Fig. 1, and the series ofrollers may be divided up into sections, each driven by its own motor.The rollers are suitably housed in the longitudinal framing of the milland are driven by beveled gearing m from a shaft m, extending lengthwiseof the mill, Figs. 4, 5, and 6, which shaft is driven by gearing m Fig.4, from the motor M. At the point where this shaft on meets the rollframes or housings II it is interrupted, and motion is transmitted fromone shaft-section to the next by means of the pinions m and shaft m asseen in Fig. 5.

At the discharge end of the mill is a shear S, Figs. 1 and 2, actuatedfrom a steam-cylinder S or other suitable motor, and we also provide alight traveling overhead crane E, which is intended to take thepartially-reduced ingot after the first pass has been completed and toquickly transfer it back to the front end of the mill and to place itupon the roller-table at that point in position for the second pass. Inlieu of this transferring device other means can be employed-as, forexample, a power-driven auxiliary roller-table arranged alongside of themill. In this case the partially-reduced product after being deliveredfrom the last pair of rolls will be shifted sidewiseupon the auxiliaryrollertable, carried back by said table to the front end of the mill,shifted sidewise again in front of the proper groove in thereducing-rolls, and again passed through the mill. In its first passagethrough the mill any suitable means of turning the ingotas, for example,a manipulator (typified at A, Fig. 4)-may be employed, because the ingotat this time is not of a length to engage two pairs of rolls at once;but in passing a second time through the mill the partially-reducedproduct is of such length that it enters the pair of rolls in frontbefore it quits the pair in rear. Therefore we provide in connectionwith the second set of grooves in the reducing-rolls twistguides of anysuitable known kind, (typified at G, Fig. 4,) by which the first end ofthe product is given a sufficient spiral movement or twist that it willhave been turned ninety degrees by the time it enters the second pair ofrolls.

The mode of operation is as follows: The hot ingot, which weighs aboutthree thousand pounds and is about sixteen inches by sixteen inches incross-section, is taken from the heatin g-furnace by a traveling craneor other suitable means and laid upon the roller-table in front of theprimary set of grooves r of the first pair of reducing-rolls R. It iscarried forward to and passes between this pair of rolls out upon therolling-table T beyond, being of such length that it quits the firstpair of rolls R before it reaches the second pair R It is then turned so.as to present fresh faces to the second pair of rolls 3*, between whichit then passes out onto the roller-table T beyond and so on until it haspassed between and beyond the last or finishing pair'of rolls R, bywhich time it will have a crosssection (square in shape) of about eightinches by eight inches and will be correspondingly elongated. The firstend of the partially-reduced ingot is next sheared ofi by the shear S,and the product is then seized by the traveling crane E and quicklytransferred back to the front end of the mill onto the roller-table T infront of the second set 7' of grooves in the reducing rolls. It thencepasses again through the mill, this time through the grooves r-,withwhich the reducing-rolls are respectively provided. By the time it haspassed this second time beyond the finishing-rolls B it will have beenreduced to the shape of a rod or bar about four inches by four inches incross-section. passage through the mill the original ingot was elongatedto such an extent that during its second passage therethrough, whichreduces it from eight inches by eight inches to four inches by fourinches in cross-section,- the rolling process is a continuous one, theproduct reaching to and beyond the pair of rolls in front before leavingthe pair of rolls behind. In order therefore to present new faces of theproduct to the reducing action of the rolls, we employ twist-guides G,as hereinbefore described,during its passage through which the productis given a turn of ninety degrees, or thereabou t. The product passingout from the grooves r of the final or finishing pair of rolls R is thencut up'into the lengths required for further treatment (usu= ally fourfeet long) by means of either fixed shears or rotary shears, as may berequired. If fixed shears are used, the entire product that is, theentire length of the reduced in gotcomes out from the last pair of rollsbefore the shearing operation. If rotary shears be used, the product iscut up just as fast as it comes out from between rolls.

Having now described our improvement and the best way at present knownto us of the last pair of By its first carrying the same into effect,what we claim In testimony whereof we have hereunto herein as new, anddesire to secure by Letters signed our names in the presence ofsubscrib- 15 Patent, is as follows: in g witnesses.

The combination of the series of pairs of SAMUEL T. WELLMAN 5reducing-rolls provided each with reducing FRED H. DANIELS.

grooves 0r passes 0", T the roller-tab1es,twist- CHARLES H. WELLMAN.

ing-guides for turning the product during its Witnesses to signatures ofSamuel T. Wellsecond passage through the rolls, and means man andCharles H. Wellman:

for transferring the partly-reduced product 0. W. COMSTOOK,

10 back to the front of the mill, these elements A. B. OOLTON.

being constructed and arranged together for W'itnesses to signature ofFred H. Daniels: joint operation, substantially as and for the N. G.STODDARD,

purposes hereinbefore set forth. 0. W. COMSTOCK.

